Most of us just subscribe away at services that either give us feature or fun. What we end up with is a huge amount of profiles, with different user names and passwords (maybe not), where we provide the same information, such as email, birthday, photo, etc. This poses many privacy threats that most users aren’t aware of, such as linking all of those profiles or accounts together, revealing that a Facebook user has a Flickr account and likes to listen to music on LastFM.

IdentiFight aims at raising user awareness towards how much privacy is being breeched right now, just by using common identifiers e.g. an email address, in different profiles at different websites. In their own words:

Given an email address, IdentiFight searches as many sites as possible and finds accounts that are linked to that email address. It then presents a bit of information about each account, plus details for how to change the privacy settings for each site. There are also links to each site’s privacy statement.